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A302871
Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
0
1, 3, 17, 95, 1197, 45897, 3780984, 786125894, 460770487307
OFFSET
1,2
COMMENTS
Diagonal of A302877.
EXAMPLE
Some solutions for n=5
..0..1..0..1..0. .0..0..0..0..1. .0..1..0..1..0. .0..1..0..1..1
..0..1..0..1..0. .1..1..0..0..0. .0..1..1..1..0. .1..1..0..0..0
..0..1..1..1..0. .0..0..0..0..0. .0..0..0..1..0. .0..1..0..1..0
..0..0..0..1..0. .0..1..0..0..1. .0..1..0..1..0. .0..1..0..1..0
..0..1..0..1..0. .0..1..1..1..1. .0..1..1..1..0. .0..0..0..1..0
CROSSREFS
Cf. A302877.
Sequence in context: A086842 A151330 A370570 * A010913 A142988 A356267
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 15 2018
STATUS
approved